I my old FAT PSP broke. not bricked, but shatterd :) dunt ask me how :).
but anyway, i havnt been on these forums for over a year and i kinda forgot how things worked.
i wanna upgrade/downgrade or whatever its called on my psp 3000 so i can install emulators and going to be able to play games off my memory stick.
please help me and send me links to certain guides that explain how to homebrew the stuff i gotta do.
EDIT: Its version 4.21.